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  2. Secondary School Mathematics Curriculum Improvement Study

    en.wikipedia.org/wiki/Secondary_School...

    Work on the SSMCIS program began in 1965 [3] and took place mainly at Teachers College. [9] Fehr was the director of the project from 1965 to 1973. [1] The principal consultants in the initial stages and subsequent yearly planning sessions were Marshall H. Stone of the University of Chicago, Albert W. Tucker of Princeton University, Edgar Lorch of Columbia University, and Meyer Jordan of ...

  3. Mathematics education in the United States - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education_in...

    The American high-school geometry curriculum was eventually codified in 1912 and developed a distinctive American style of geometric demonstration for such courses, known as "two-column" proofs. [49] This remains largely true today, with Geometry as a proof-based high-school math class.

  4. Internal Revenue Manual - Wikipedia

    en.wikipedia.org/wiki/Internal_Revenue_Manual

    The IRS Internal Revenue Manual is the official source of instructions to IRS personnel relating to the organization, administration and operation of the IRS. The IRM contains directions IRS employees need to carry out their responsibilities in administering IRS obligations, such as detailed procedures for processing and examining tax returns.

  5. Van Hiele model - Wikipedia

    en.wikipedia.org/wiki/Van_Hiele_model

    The van Hiele levels have five properties: 1. Fixed sequence: the levels are hierarchical.Students cannot "skip" a level. [5] The van Hieles claim that much of the difficulty experienced by geometry students is due to being taught at the Deduction level when they have not yet achieved the Abstraction level.

  6. MACRS - Wikipedia

    en.wikipedia.org/wiki/MACRS

    The Internal Revenue Service (IRS) publishes detailed tables of lives by classes of assets. The deduction for depreciation is computed under one of two methods (declining balance switching to straight line or straight line) at the election of the taxpayer, with limitations. [1] See IRS Publication 946 for a 120-page guide to MACRS.

  7. Customer Account Data Engine - Wikipedia

    en.wikipedia.org/wiki/Customer_Account_Data_Engine

    Customer Account Data Engine (CADE) is the name of two Internal Revenue Service (IRS) tax processing systems, used for filing United States income tax returns. Work on the original CADE, designed to replace the Individual Master File (IMF) system, was begun in 2000 and stopped in 2009. The original CADE is in active use; for instance, in 2009 ...

  8. Internal Revenue Service Restructuring and Reform Act of 1998

    en.wikipedia.org/wiki/Internal_Revenue_Service...

    The Internal Revenue Service Restructuring and Reform Act of 1998, also known as Taxpayer Bill of Rights III (Pub. L. 105–206 (text), 112 Stat. 685, enacted July 22, 1998), resulted from hearings held by the United States Congress in 1996 and 1997.

  9. Secondary cell wall - Wikipedia

    en.wikipedia.org/wiki/Secondary_cell_wall

    Pectins may also be absent from the secondary wall, and unlike primary walls, no structural proteins or enzymes have been identified. [4] Because of the low permeability through the secondary cell wall, cellular transport is carried out through openings in the wall called pits. Wood consists mostly of secondary cell wall, and holds the plant up ...