I've taught and tutored these concepts for years now...
Money:
Count by 5's, 10's, 25's. (don't forget to count by 10's starting with a 5 EX: 5, 15, 25)
Always give the child a routine to count coins. Step 1: Sort money into like piles. Step 2: Try to make dollar piles first if possible. Step 3: Count money with largest valued coin first. This is where counting by 5's, etc pay off. Step 4: Have the child write the answer with a dollar sign and decimal. I always told my kids that the $ and . are partners and that they can never be in the same room as the cent sign.
Also use money riddles: What 4 coins make $.45?
Once child understands how to count money, then start to make change.
If a child does not understand that coins are less than a dollar, take a fake dollar bill and rip it into 4 pieces and put a quarter on each piece. Likewise for the rest of the coins. This makes the abstract more concrete.
Time:
Explain that the hour hand only is on the number on the hour and then AFTER the number. Too many people ask, "What number is the long hand on?" It should be, "What number is the long hand on or AFTER? Get a JUDY clock to properly show how the clock works (sold in teacher stores pretty inexpensively). Talk about base 60. That means that when get to 60, we start over. (We use base 10 for regular counting and money). Use matching cards for kids that need something to physically move. One card says: 24 hours = The matching card says: 1 Day Talk about how many hours are in the day, days in the week, weeks in the year, etc. Don't forget about explaining leap year. :)
Let me know if you have a specific issue and I might be able to give you a better tip. :) And you're right...after second grade time and money are barely touched. This is sad because a lot of kids aren't developmentally ready to understand these very complex concepts until they are older. I've worked with 7th and 8th graders who never understood. Wasn't because they weren't able to understand it, it was because they weren't ready to learn it the few chances they were given it the first times.
Best of luck! And remember patience is a virtue. :)