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2. Greater-than sign - Wikipedia

   en.wikipedia.org/wiki/Greater-than_sign

   In mathematical writing, the greater-than sign is typically placed between two values being compared and signifies that the first number is greater than the second number. Examples of typical usage include 1.5 > 1 and 1 > −2. The less-than sign and greater-than sign always "point" to the smaller number.

3. Sieve of Eratosthenes - Wikipedia

   en.wikipedia.org/wiki/Sieve_of_Eratosthenes

   Note that some of the numbers may be marked more than once (e.g., 15 will be marked both for 3 and 5). As a refinement, it is sufficient to mark the numbers in step 3 starting from p 2, as all the smaller multiples of p will have already been marked at that point. This means that the algorithm is allowed to terminate in step 4 when p 2 is ...

4. Less-than sign - Wikipedia

   en.wikipedia.org/wiki/Less-than_sign

   The less-than sign is a mathematical symbol that denotes an inequality between two values. The widely adopted form of two equal-length strokes connecting in an acute angle at the left, <, has been found in documents dated as far back as the 1560s.

5. Jigsaw (teaching technique) - Wikipedia

   en.wikipedia.org/wiki/Jigsaw_(teaching_technique)

   Worksheets give immediate feedback, allow for repeated practice, make students active rather than passive learners and allow students to ask for help from the instructor. Drawbacks include students' uneven readiness the substantial time required to complete. Students worked in groups on two occasions. In the first, four worksheets were supplied.

6. Polygon - Wikipedia

   en.wikipedia.org/wiki/Polygon

   To construct the name of a polygon with more than 20 and fewer than 100 edges, combine the prefixes as follows. [21] The "kai" term applies to 13-gons and higher and was used by Kepler , and advocated by John H. Conway for clarity of concatenated prefix numbers in the naming of quasiregular polyhedra , [ 25 ] though not all sources use it.

7. Habitat - Wikipedia

   en.wikipedia.org/wiki/Habitat

   This habitat is very challenging to research, and as well as being little-studied, it is vast, with 79% of the Earth's biosphere being at depths greater than 1,000 m (3,300 ft). [35] With no plant life, the animals in this zone are either detritivores , reliant on food drifting down from surface layers, or they are predators, feeding on each other.