Math 247: Math for Elementary Education II (10 am session)

Dr Langford
Contact me:
My schedule
My office phone number:
Grading policies, etc
General syllabus

Useful Links:
Math solutions online newsletter archives


e-mail Dr Langford:

Schedule: Unless otherwise noted, you do not need to bring your texbook to class unless you have a question on a homework problem assigned from the textbook.

Mon Wed Thurs Fri
Jan 27 NH 16
Introductions and fraction representations.
Homework: Read pages 1-3 of the lecture notes and bring questions to class

NH 16 Equivalent fractions and comparing fractions

NH 16 More with comparing fractions and equivalent fractions

NH 320
Comparing fractions lab
Lab Assignment Extra help
Virtual manipulative tool
Download the file
Homework assn (due Mon)

Feb 3 NH 16
Simplifying fractions. Post your favorite method to the D2L discussion board

NH 16

NH 16

NH 320
Lab Discussion Assignment
Comparing Fractions tool
Number Line Bars
Feedback on HW1

Feb 10 NH 16

NH 16
Reading assignment:
Read parts and wholes
Try some word problems
NH 16 NH 320
Week 3 homework (due Monday)
Class notes so far (up to pg 16)
NLVM multiplication of fractions
Geogebra multiplication file
Feb 17

Test 1 review sheet
Notes on HW3
Review sheet partial solutions

. Exam 1
Online lesson and assignment. The assignment is to take and turn in the notes for the numbered questions in the lesson.
Feb 24 Exam 1      

Mar 3 Measurement division with two numberlines example 1; example 2
Partition division with two number lines or a bar diagram example 1 (proper frac); example 2 (mixed num)
Homework: do measurement division problems 4-5
Answers to measurement problems 1-3 are here. and partitive division problems 7-9. Due Wednesday.

  Homework: explain multiplication of mixed numbers two ways for the problem 2 2/3 x 1 1/2. Do it by showing how to simplify by FOILing visually, and do it by splitting into equal sized fraction pieces.

In class assignment: Fraction division Notebook to download.
Open with SMART Notebook Express.
Example work.

Examples for homework
Homework: do problem 3
Some exam 1 answers


Mar 10 In class: start solving these word problems.
Study for the quiz. Solve the rest of the word problems and check your answers with these solutions.
Then figure out whether each problem is multiplication or division (and what the number equation is) and check your answers here.
3 more practice problems
And the answers


Mar 17 Spring Break Week
Mar 24 Area: rectangles and equality by subdividing
About area (I am adding information to this page--keep coming back here for more area examples)

Parallelograms and triangles
(For notes see the "about area link")
Assignment (due Friday)

Circles and composed area.
Assignment (due next Monday)
Examples: h, i, j

Pythagorean theorem and more lengths
Downloads: Sketchpad Pythagoras
Geogebra Additive Pythagoras
Geogebra Subtractive Pythagoras
In class assignment

Mar 31 Lengths on a geoboard
Ratios and similar triangles
In class work (not collected)
Homework (due Monday) No on-campus class. Instead please do this. Homework from this link due Wednesday
Apr 7 Area and similarity
prisms: nets and surface area

pyramids: surface area

prisms and pyramids: volume
Youtube vid


Apr 14 Similar 3D shapes
Topics to practice for test
similarity and volume

lines and planes

Measurement exam
Apr 21 Ratios
In class notes
Handout (do last page as HW due Weds)
more ratios
Problem solving with changing ratios
Record your answers on this sheet
Describing ratios

Assignments: Ratio practice
Percents intro
Percents visualization tool

Apr 28 Percents: Videos to watch (Follow the video links in the middle of the page)

numerical and categorical data
Category vid
Measurement vid

Before Friday, please review averages: mean, median, and quartiles
Practice averages on these problems
Version with solutions
More percent practice problems and solutions

Averages and spread assignment
May 5 Probability: tree diagrams and sequential events.
Assignment (due Thursday)

Tree and area diagrams

Some topics to study review
Final exam is Weds May 14 at 10:15-12:15