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celeriko
  • Member for 9 years, 6 months
  • Last seen more than 5 years ago
48 votes
39 answers
22k views

Real-world examples of more "obscure" geometric figures

21 votes
2 answers
339 views

DIY/Hack Instructional Implements

21 votes
5 answers
1k views

Good way to explain why an absolute value in an equation does not automatically mean to make the other side +/-

18 votes
12 answers
6k views

Factoring quadratics where the coefficient on the $x^2$ term does not equal 1

18 votes
8 answers
1k views

Rationale for not dividing both sides of an equation by $x$ (ex: $6x^2 = 12x$)

17 votes
3 answers
498 views

Good lessons/activities for one-day subs

13 votes
3 answers
381 views

Resources on interdisciplinary curricula

12 votes
6 answers
605 views

Pedagogical quandary with the definition of $i$

10 votes
2 answers
2k views

Project/Assessment based on Flatland for Secondary Geometry Class

10 votes
4 answers
686 views

Creativity in mathematics

10 votes
2 answers
298 views

Teaching geometric transformations through fractals?

9 votes
4 answers
2k views

Secondary Geometry Curriculum Sequencing?

9 votes
5 answers
231 views

Extensions beyond Euclidian Geometry for Secondary students

8 votes
3 answers
209 views

Pi Day Celebration Ideas?

8 votes
5 answers
2k views

Teaching students to write the "invisible" ones

7 votes
5 answers
2k views

Constructing and sketching parabolas, conic sections and other curves

7 votes
3 answers
7k views

System of Equations Generator

6 votes
2 answers
194 views

Mathematics that can be worked into 8th grade engineering course

5 votes
5 answers
179 views

Resources for math enrichment for home-schooled student

4 votes
1 answer
2k views

Correct term to say that a number divides another number "evenly"?

4 votes
7 answers
1k views

Fun Activities/Games Before a Break/Between Units for Secondary Geometry

3 votes
0 answers
83 views

Student input in secondary teacher evaluations

3 votes
2 answers
410 views

Permutations with identical objects

3 votes
3 answers
2k views

interesting/challenging geometric constructions for gifted secondary students

2 votes
0 answers
56 views

Lancasterian/Monitorial system at a secondary level?