Explanation of IU's IUs in the Original
Idea Units: Student 017
Student's Original Student'sAnalyzed
 
     Aluminum is an abundant (2) metal (1) which comes from bauxite (4). Bauxite is a type of ore (5) which looks like clay (6) and contains aluminum (7). After, the workmen dig up the bauxite (1) They Then grind (11) the bauxite. Then they place (12) it into pressureized (13) tanks. The other substances which are left over from grinding  the bauxite (2) forms a mass (14). Then the workmen use filters (16) to seperate the mass (15) from the liquid (17) by using filters (3). The workmen also, put the liquid through many other processes (18) besides the filters (4). After, this process it yields (19) to a powdery (20) white (21) chemical called "alumina" (23). The final process which the workmen do (5) is, seperating (26) the aluminum from the oxygen by using electricity (27). After all these processes occur the finished product (28) which is called "Aluminum" (6) is produced. Aluminum is bright (31) and has a silvery (32) finish. Finally, this metal which is called aluminum (7) comes in many different (8) shapes (9), sizes (10), and forms (33).


Missing:
# 3 "has many uses"
# 8 "several"
# 9 "other substances"
# 10 "extract these other substances"
# 23 "mixture" [Implied]
# 24 "contains aluminum"
# 25 "contains oxygen"
# 29 "light"
# 30 "luster"
Added IUs:
# 1 "After the workmen dig up the bauxite"
# 2 "which are left over from grinding  the bauxite" [Note that this addition probably caused the subject/verb agreement error -- "substances ... forms"]
# 3 "by using filters" [Repetition of previously stated IU]
# 4 "besides the filters"
# 5 "which the workmen do"
# 6 "which is called "Aluminum" [Note that "produce a metal" has bcome "product ... is produced," with this clause modifying "product."]
# 7 "which is called aluminum"
# 8 "different"
# 9 "shapes"
# 10 "sizes"
Content errors: