Which of the following represents the rate-determining transition state for the formation of the MAJOR product in the reaction shown below? Note: The relative reaction rates of 1° H : 2° H : 3° H are 1 : 4 : 5, respectively. Both chain propagation steps of the reaction are exothermic.

For each pair of reactions shown below, determine which reaction would proceed at a faster rate. A or B: [AorB] C or D: [CorD] E or F: [EorF]

Select appropriate reagents/conditions to carry out each of the transformations (A-F) below.

Select appropriate reagents/conditions for each of the following transformations. Note that reaction D produces a mixture of two glycol stereoisomers; reactions B and C each produce only ONE of these stereoisomers.

Identify the predominant mechanism(s) for each of the reactions (A-C) shown below. Helpful hint: the pKa of HN3 is 4.6.

The reaction shown (reaction 1) below is a so-called semipinacol rearrangement. Silver nitrate is added to the reactant in order to precipitate silver iodide and produce a carbocation. Draw the most stable chair conformation of the starting material on your scratch paper and answer the following questions. After the formation of the initial carbocation, a rearrangement takes place. The migrating group or atom must be anti to the leaving group (the bond containing the migrating electron pair will be drawn parallel to the carbon-iodine bond in your chair conformation). Would you expect a hydride shift or a ring contraction to occur? [rearrangement] Which of the following (A-D) depicts the expected major product of reaction 1? [product1] The outcome of the reaction discussed in this problem is highly dependent on reactant stereochemistry. Consider reaction 2 (shown below) and answer the following questions. In the most stable chair conformation of the reactant (tert-butyl is equatorial), is there a migrating group (hydrogen atom, alkyl group, or C-C ring bond) that is anti to the leaving group? [anti] Which of the following (E-F) might reasonably form as the major product of the reaction? [product2]

Which of the following options represents the rate-determining transition state of the reaction shown below?

What type of assessment is used throughout teaching of a lesson and/or unit to gauge students’ understanding and inform and guide teaching?

Place the progression of the PBA lesson plan format in the correct order based on the gradual release of responsibility from teacher to student. 

What is a common term for instruction that starts with large group lesson or directions then breaks into smaller groups (guided, independent, collaborative/stations) and ends with a large group review or wrap up?