Lesson Plan Template
Teacher Candidate: Barry Rollins Lesson Topic: Distance Formula
Date: 5-11-2011 Grade Level: 9th
Approximate Time: 55 Minutes
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Stage 1 – Desired
Results
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National Standards: Using the Common
Core Standards:
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8.G.8.
Apply the Pythagorean Theorem to find the distance between two points in a
coordinate system.
Georgia Performance Standards:
MM1G1a. a. Determine the distance between two points.
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Essential Question: How can we find distance using the
knowledge we have already gained? Is there an easier way?
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Stage 2 –
Assessment Evidence
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Performance Tasks:
Group
Work on Distance
(Includes
all files attached except for Distance Formula Notes)
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Other Evidence
Math
1 Final (not attached, two questions will concern distance)
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Stage 3 – Learning
Plan
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Materials and Resources (Attach all
templates.):
Activator
Distance
Intro
Grid
Practice
Distance
on a plane
Plane
practice
Distance
Formula Notes
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Technology (If no technology is used in
this lesson, provide a justification for choosing not to use technology.)
For this lesson I am not using
technology. I am a major advocate of
technology, especially since the arrival of my Promethean board, and had
initially planned to use a flipchart to assist with this lesson. During the last week the motherboard has
been replaced, and as of today (May 9th) a pen has gone bad and my
laptop will no longer work with the system.
This may be fixed by the time of the lesson, in which event I may display
some of the attachments to use as a template for teaching. I have decided it would be prudent to
prepare for complications and this seemed the best way to ensure the lesson
would be presented effectively without concern.
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Activating Thinking Strategies LKWL,
Questions, PBL, Word Splash, Concept Attainment Activities, Anticipatory
Guide…):
To
begin the lesson I will allow the class to divide into their own groups. This is an advanced group of students and I
have been grouping them all year, so I have decided it will be interesting to
see what choices they make when left to make their own decisions. The activator worksheet will then be handed
out, and includes a review of the Pythagorean Theorem. The activator has two purposes. First, the use of the Theorem is important
to the lesson and the skill needs reviewing as they have not used it since
the beginning of the year. Second, the
Theorem is essential to derive the distance formula, and hopefully the activator
will assist the students with making the connection on their own, rather than
have me present the formula to them.
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Teaching Strategies (whole group, small
group, active engagement of ALL students):
Once the activator is complete students will
work on the Distance Intro worksheet in groups. The questions are designed to initially
have them consider distance based on Taxicab Geometry (which may come up in
discussion), which assists in creating the right triangle. This leads into a discussion of straight
line distance and hopefully they will connect the Pythagorean Theorem with
finding this distance. The grid
practice document then provides practice for the students and an opportunity
for me to monitor their work and look for misconceptions. The Distance on a plane document uses
questioning in an attempt to have the students derive the distance formula on
their own, although guided questioning and direct instruction may be needed
at this point. This is followed by
plane practice, which once again offers me the opportunity to monitor the
students as they work and look for misconceptions. The bottom of this document asks for
students to answer the essential questions, and this section will likely be
used to lead a class discussion of the topic.
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Evidence of Differentiated Instruction
(Content, Process, and Product: MI, Learning Styles, Flexible Grouping,
Stations, etc.):
The
lesson combines different styles of content and process within the
delivery. There are sections where the
content is higher level, usually along with a process of discussion and
making connections to previous material. Examples of this would be realizing
the use of the Pythagorean Theorem to find distance, and also connecting this
concept to derive the distance formula.
There are also sections which offer opportunity for practice and
direct instruction in groups as needed, such as the grid and plane practice
documents, which may assist students who learn math better as a “skill and drill”
process. This is as flexible as my
grouping has ever been, as I am allowing the students to choose their groups
were I would normally divide them based on their abilities or personalities. Hopefully this will produce an interesting
dynamic as groups attempt to progress with the assistance of their partners,
and likely their friends. I believe
technology would have assisted in making the concepts more visual, but
hopefully the design of the documents and progression of the lesson will
assist in making the concepts coherent.
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Modifications for Special Needs Students:
(IEPs, etc.)
There are no special needs students in the
class being observed, but the same lesson will be used earlier in the day for
a collaborative Math 1 class. The
students will be given the distance formula notes document, which not only
explains the topic, but also explains some common misconceptions and mistakes
students make with the formula.
Grouping will be designed in this class, and will be done in mixed
ability groups. There will also be an
increased amount of direct instruction and guided questioning during the
lesson. If any students have issues
with reading they will be paired with other students for assistance, and they
may also use their notes handout to assist when completing the practice
sections of the lesson.
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Summarizing (List higher order thinking
questions to determine what students have learned; Students answer essential
question):
The
summarizer for the lesson is included with the last practice document, which
asks students to answer the essential questions for the lesson. This will be done as a discussion, and
hopefully will lead to an understanding first of how to apply the Pythagorean
Theorem to find the distance between two points. Also, this is designed to assist students
in realizing the distance formula is basically a shortcut to solve the
problem, and that it can be useful with more difficult problems where side
lengths may be difficult to find as they are not integers, and also create
more accurate answers by avoiding rounding during the process.
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Stage 4 –
Reflections
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Pre- Teaching Reflection:
The lesson is tied directly to other
topics the students have studied, namely the Pythagorean Theorem. It was introduced during their eighth grade
year, and extended this year to include the converse of the theorem and
triangle classification. The activator
is designed to assist them in revisiting this knowledge, with remediation if
needed, and also to assist in making the connection to the Distance
formula. I have mentioned why the
technology will not be in use.
Currently the board is working again, although there are still some
issues with the pens and not everything has been worked out to my
satisfaction. Considering modifications, I think the guided notes will be
very useful for many of my students.
In my collaborative class I plan to go through the process of labeling
the points and plugging them into the formula thoroughly, as the formula is
provided for their end of course test.
The first handout is designed to have students consider Taxicab
Geometry initially, only using avenues and streets to reach their
destination. This should assist them
in seeing the right triangle that is formed when working in this manner, and
hopefully the connection to the Pythagorean Theorem and the hypotenuse being
the missing length will be made without too much guidance. The grid practice document offers more
practice wherein hopefully students who understand the concept can assist
others in their group, and also I will have an opportunity to monitor the
students as they work as well. The
concept is then applied to the coordinate plane with the next handout, and it
is assumed students will use the same method to find the missing
distance. At the bottom of this
document I attempt to use leading questions again, hopefully assisting the
students in realizing shortcuts to find the distance, and possibly even to
derive the distance formula itself.
If time permits at this point I may go
into a discussion of the formula, labeling points, and working out the
calculations. The class observed has
many advanced students, and many will have made this connection for
themselves. Again, I will focus on
that part in some of the other classes where it will be needed. The lesson is summarized with the essential
questions, and the connection to the Pythagorean Theorem should be first
identified as the method already learned which can assist in calculating this
distance, as well as the use of the Distance Formula to assist in making the
process easier and faster.
I believe this lesson to be crucial and
vital, considering the topic of the lesson to be the Distance Formula and the
connection with the Pythagorean Theorem.
The Theorem is one of the most important to Geometry in my opinion,
and the many applications of the Theorem are very useful in everyday life for
the students. Not to mention the
variety of proofs of the Theorem and their worth in modeling this important
process. The Formula also provides a
method of calculating distance which can be applied in many jobs as well as
daily life. Another standard in this
unit is quadrilateral properties in the coordinate plane, and the Formula is
essential in finding side and diagonal lengths to prove these properties.
The lesson also calls for
creativity. I think the concept is
often taught by introducing the formula, how to label points, and how to work
out the math. Honestly when I taught
Geometry my first year that is exactly how I did it. This lesson makes the connection to the
Pythagorean Theorem, and then allows students the freedom to make their own
connection to the Formula and even attempt to derive it for themselves. Students can now be creative in coming with
solutions for the Taxicab problem initially posed, as well as applying the
Theorem and trying to derive the Formula.
Finally, I believe the lesson to be
coherent. The activator reintroduces
the Theorem and allows students a chance to practice it, as well as allows me
the chance to remediate if needed. The
introduction of Taxicab Geometry forces students to look at the distance
using a 90 degree angle, and should lead to the discovery of the right
triangle and possible use of the Pythagorean Theorem to find the missing
length. The questions then guide the
students towards this knowledge, followed by time to practice the new
skill. Once this is done the knowledge
is applied to the coordinate plane, and questions again guide the students
towards the Distance Formula. At this
time I can remediate and focus on the basic skill if needed, or save the time
for the final discussion of the essential question if the class is doing well
with the concept. Overall I must say I will miss my technology, but that I
believe the lesson should go well without it if things go as planned.
Post- Teaching Reflection: (Assessed on the TPOI Rubric)
The main goal of this lesson
was to have students make the connection between the Pythagorean Theorem and
the Distance Formula, and I think the lesson was effective in this
respect. The initial activator allowed
students the time to practice, and while many solved the problems without
issue, I was able to assist some students with misconceptions. The most common misconception was labeling
the hypotenuse incorrectly, and also some students would forget to take the
square root to complete the problem.
The initial Taxicab Geometry sheet worked well, and most students made
the connection to the Theorem and solved the problems. A few realized we were working towards the
Distance Formula as they had been exposed to it in their support class, and
one student even mentioned liking to draw the triangle and use the Theorem
better. Most students had little issue
with the grid practice, as well as applying the knowledge to the coordinate
plane. I noticed deriving the formula
was a challenge for many of the students, although they were really using it
in their computations without realizing it. One student said the formula was
too hard so I asked him how he did the problem. As he described each step I would explain
which part of the formula he was completing, and by the time he was done we
arrived at the same answer. I am not
sure if this helped him or not, but I think it helped put the Formula more in
the terms that students would use and may have been helpful to others.
I think the lesson had several strengths,
most of which have been mentioned above.
The guided questioning was useful to help students create connections
of their own. I think putting these on
the papers also allowed faster students to work ahead and make this
connection, without stating it before other students were able to come to
their own conclusions. The practice
also worked well in solidifying the concept for many of the students. Finally, the flexible time I was using for
either extra work labeling points and using the formula or discussing the
essential question worked fairly well, although time was somewhat
constraining. While the lesson had
many strengths, there were more weaknesses than just the time constraint I
ran into. The main weakness was in the
Distance on a plane document. As
mentioned before, students found it very challenging to derive the formula on
their own. This may have been due to
lack of prior experience isolating variables within equations, or possibly
more guidance as needed for the process.
Either way I found this to be the biggest weakness of the lesson.
To solve these issues in the future, I
would first address the time constraints.
I think the activator would be the best way to resolve this issue, as
it involves several problems using the Pythagorean Theorem. My initial thought was that more students
would try the work in the groups as there were a similar number of problems
to the number of students in the group, but if I cut this down to two
problems (one to find a leg and one a hypotenuse) I believe it would still
serve the purpose intended and allow me more time later in the lesson on the
current topic. As for the major
weakness in the Formula derivation, I think using some of the comments made
by my student may be effective. I
could use more guiding questions, and describe the steps of the Formula in
terms similar to the student. I could also
fill in some of the structure of the Formula for students who find this more
challenging, to assist them in completing the task for themselves as well as
to help model variable isolation from the Theorem. While this was not stated directly as a
weakness or issue, my final change would be the use of technology. I could easily use visuals of taxi cabs to
assist students in finding the right triangle, and could use coordinate
planes to assist with this visual as well.
There is good chance that with full use of my Promethean board the
concepts of this lesson would remain unchanged, but the delivery would take a
much stronger presence.
I think the students took the lesson
well, and judging from their comments during the lesson I believe the topic
was understood by most. I know I will
likely need to spend time on the subject tomorrow in my collaborative class,
and reinforce the connections as well as labeling of points and use of the
Formula. It was also interesting and
refreshing to hear students mention prior knowledge from their support class,
and I think this assisted many of them with their confidence levels and
resulted in better work during the task.
Considering conversations with others, the majority of this lesson is
a work in progress and is the result of conversations with other
teachers. As I mentioned before I initially
began instructing students by providing the Formula and showing them how to
plug in the coordinates and solve for the distance. It was my department head who first
mentioned using the Theorem to introduce the concept, and I tried this last
year for the first time. Before I
began to write this particular lesson, I looked online and reviewed Power
Points and lecture motes from some other schools and colleges. I then found the idea for the Taxicab
Geometry, and created the guided questions to assist the students. I have not discussed this lesson
specifically with any parents, although I have often discussed the class and
my teaching method with parents. I
believe the majority of students enjoy my class, and most are also
successful. Two of my coworkers have
daughters who are in ninth grade this year, and they were asking me which
classes I would have to try and get them into the ones I would teach. I am now getting similar questions as to
whether I will move up to Math 2 along with this class of students, but my
Principal has a daughter who will be entering the ninth grade. I hope to be asked to teach this course
again, as assignment of another teacher to the course might infer I was not
as prepared to teach the class. I
believe I will have the class again, however, and have even talked some with
the Principal about the Department Head position. Keeping my fingers crossed.
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1.
How can you get from point A to B using only the
streets and avenues?
2.
What is the shortest distance from point A to
point B using only streets and avenues?
3.
How many ways can you get from point A to point
B in the shortest distance?
4.
Is there an even shorter way to get from point A
to point B if you are not confined to the streets and avenues?
5.
How can we calculate the straight-line distance
from point A to point B? Do any of the things we have learned help us? What is
the distance?
1.
Find the distance between the points.
2.
Is there an easier way? How could you find the lengths using the
coordinates of the points?
3.
How could we write a formula for distance?
Distance = ?
SUMMARY: Answer our
essential question:
How can we find distance using the knowledge we have already
gained? Is there an easier way?
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